As a massive project Linux is split into several mostly-but-not-really-independent "modules" which get dynamically linked together as the kernel is running! Userspace (rarely) generally initiate this via the topic of today's study: LibKMod!
There's an iterator over the multistring in a modules.builtin.modinfo file. It may use OpenSSL to check cryptographic signatures. It implements a doubly-linked list datastructure. There's a parser & builder for KMod options.
